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$basetexture is a material shader parameter available in all Source games. It defines an diffuse texture. It is very rare for a material not to use this parameter and some shaders will load a default texture if it stays undefined.

VMT Syntax

$basetexture	<texture without extension, relative to <game>\materials\>

LightmappedGeneric
{
	$basetexture	brick\brickwall031b
}

Additional Parameters

$basetexturetransform <matrix>

Transforms the texture before use in the material. This does not affect lightmaps on the surface.

Note:This does affect shader parameters such as $detail and $bumpmap.

The default position is center .5 .5 scale 1 1 rotate 0 translate 0 0.

1. center defines the point of rotation. Only useful if rotate is being used.
2. scale fits the texture into the material the given number of times. 2 1 is a 50% scale in the horizontal X axis while the vertical Y axis is still at original scale.
3. rotate rotates the texture counter-clockwise in degrees. Accepts any number, including negatives.
4. translate shifts the texture by the given numbers. .5 will shift it half-way. 1 will shift it once completely over, which is the same as not moving it at all.

Note:All values must be included!

Bug:Scaling the texture may cause odd issues where the Texture Lock tool in Hammer will not actually lock the texture in place.

Bug:Rotating textures applied on brushes will rotate around the map origin (confirm: Orangebox engine only?). A fix for this is to change the center position in the VMT to the brush's origin.

$frame <integer>

The frame displayed for a multi-frame texture. This is normally set by the AnimatedTexture or {{TextureToggle}} proxies, but can be set manually.

Warning:The value must be a valid index, or crashes might occur.

$basetexture2

Some shaders (most notably WorldVertexTransition) allow the use of two albedos. The second texture is handled by a mirrored set of commands with '2' in their name:

$basetexture2 <texture>

$basetexturetransform2 <matrix>

Bug:$basetexturetransform2 doesn't exist in the DirectX 9 version of WorldVertexTransition, only working with the DX8 shader. In DX9, $basetexture2 will instead move with the original $basetexturetransform in sync with $basetexture. This is the case in Source 2007, Source 2013, and Alien Swarm. Other games have not been tested.

Code Fix:  Mapbase adds support for $basetexturetransform2 in Source 2013. The specific code can be found on its repository in the LightmappedGeneric shader files.

$frame2 <integer>

There are further '2' commands applying to various shader effects, which are each documented in their respective articles.

See Also

• $envmapmask (specular mask)
• $envmap (environment map)
• $phong (diffuse reflection)
• $selfillum